JP3012405U - Camera with built-in spirit level - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a camera with a built-in electronic level that can display the electronic level in the viewfinder. [Structure] A spirit level 5 is arranged in the lower front part of the pentaprism 2, and a first reflecting mirror 6 is provided in the upper part in the front part of the pentaprism 2, and a second level is provided between the spirit level 5 and the lower part of the pentaprism 2.
The reflecting mirror 7 is provided, and the light from the level 5 is sequentially reflected by the first and second reflecting mirrors 6 and 7 to enter from the third reflecting surface 2b of the pentaprism, and then to the eyepiece 4. The image of the electronic level is displayed in the field of view in the viewfinder.

Description

[Detailed description of the device]

[0001]

【Technical field】

 The present invention relates to a camera equipped with a spirit level, and more particularly to a camera capable of displaying an image of the spirit level in a field of view in a viewfinder.

[0002]

[Prior art and its problems]

 When photographing a building by the Aori mechanism, or in academic photography, it may be necessary to correct the horizontalness or verticality of the camera. For such a purpose, conventionally, the electronic level has been attached to a part of the camera or attached to a release button, an accessory shoe, or the like.

However, in such a configuration, when the composition is determined by the finder, the eye is once removed from the finder to look at the level, and if the level is wrong, the composition is corrected and the composition is looked into the finder to correct the composition. As described above, it was necessary to repeatedly check the viewfinder and the electronic level alternately until both conditions were met at the same time, and it took a very long time to shoot.

[0004]

[The purpose of the device]

 The present invention has been made to solve the above problems, and an object thereof is to provide a camera with a built-in electronic level that can display the electronic level in the field of view in the viewfinder.

[0005]

[Outline of the device]

 The present invention arranges a spirit level near a pentaprism or a pentamirror of a single-lens reflex camera, and a reflection means for irradiating an image of the spirit level to an eyepiece through the pentaprism or the pentamirror. The feature is that the image of the electronic level is displayed on the screen.

According to another aspect of the present invention, the spirit level is arranged in the front lower part of the pentaprism or the pentamirror of the single-lens reflex camera, and the first reflecting mirror is provided in the front upper part of the pentaprism or the pentamirror. A second reflecting mirror is provided between the level and the lower part of the pentaprism or pentamirror, and the light from the level is sequentially reflected by the first and second reflecting mirrors, and the third reflecting surface of the pentaprism or pentamirror. The feature is that the image of the electronic level is displayed in the viewfinder internal field when it is incident from the inside.

It is preferable to attach a lighting device for illuminating the level to the level. The lighting device can be provided, for example, on the spirit level.

More specifically, the level and the first and second reflecting mirrors are more specifically provided with a mounting seat in the lower front of the pentaprism or the pentamirror, and on the mounting seat, from the pentaprism or the pentamirror side, A two-reflecting mirror and a level can be provided, and the fixing member for supporting the first reflecting mirror can be fixed on the connection surface that connects the roof reflecting surface and the third reflecting surface of the pentaprism or pentamirror.

[0009]

[Example of device]

 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a well-known pentaprism 2 is housed inside the center of an upper decorative plate 1 of a single-lens reflex camera. A focus plate 3 is located below the pentaprism 2, and an image of a subject that is incident from a photographing lens (not shown) and reflected by a quick return mirror is always imaged on the pin plate 3 under the pentaprism 2.

Behind the penta prism 2, an eyepiece lens group 4 including a plurality of lenses is located. The eyepiece group 4 observes the subject image formed on the focusing plate 3 as an erect image by the pentaprism 2.

A level 5 is provided in the front lower part of the pentaprism 2, and an image of the level 5 is put in the pentaprism 2 in the upper front part and the lower part of the pentaprism 2, and further, First and second reflecting mirrors 6 and 7 to be inserted into the eyepiece lens group 4 are provided. More specifically, a mounting seat 8 is fixed to the front lower part of the pentaprism 2, and a level 5 superimposed on the lighting device 9 is fixed to the mounting seat 8. The second reflecting mirror 7 is located between the level 5 and the pentaprism 2 and is provided on the mounting seat 8. The second reflecting mirror 7 can be directly formed on the mounting seat 8 in addition to using a mirror or a prism as a separate body.

The first reflecting mirror 6 is fixed to the upper front part of the pentaprism 2 via a mounting member 10. The mounting member 10 is fixed to the outside of the connecting surface 2c that connects the pair of roof reflecting surfaces 2a and the third reflecting surface 2b of the penta prism 2, and the first reflecting mirror 6 is attached to the tip of the arm 10a. It is fixed.

The angles of the first and second reflecting mirrors 6 and 7 are such that the image of the level 5 illuminated by the illuminating device 9 reaches the first reflecting mirror 6 and is reflected by the first reflecting mirror 6. After the reflected light is reflected by the second reflecting mirror 7, it enters the pentaprism from the third reflecting surface 2b of the pentaprism 2 and enters the eyepiece 4 to be observed by the photographer. . Moreover, it is practical that the position is above or below the normal viewfinder field.

FIG. 2 is an example of a viewfinder field viewed by a photographer. A mark 12 for focusing is provided in the center of the finder field 11, and an image 5'of the level 5 is displayed below the screen 11. The photographer can view the image 5'of the electronic level at the same time while looking at the subject in the viewfinder field 11. Therefore, it is possible to correct the level of the camera so that the water bubble 5a of the electronic level falls within the reference lines 5b and 5b while determining the composition and focusing, and it is not necessary to keep an eye on the viewfinder during this time. Since the composition can be determined and the camera horizontal adjustment can be performed in almost one operation, the time required for adjustment of both can be shortened, shooting can be performed in a short time, and the shutter chance can be easily captured.

In the above configuration, a pentamirror may be used instead of the pentaprism 2, and the level 5 and the illumination means 9 may be provided on the surface connecting the roof reflection surface and the third reflection surface. .

[0016]

[Effect of device]

 As described above, according to the present invention, since the electronic level is built in the camera and the image is displayed in the viewfinder, it is possible to quickly determine the composition of the screen without keeping an eye on the viewfinder. You can

[Brief description of drawings]

FIG. 1 is a view showing a structure of a finder portion of an embodiment of a camera incorporating a spirit level according to the present invention.

FIG. 2 is a diagram showing a field of view in the finder of FIG.

[Explanation of symbols]

 2 pentaprism 5 level 5'level image 6 first reflecting mirror 7 second reflecting mirror 9 illumination means

Claims (5)

[Scope of utility model registration request] 1. A viewfinder in the viewfinder, wherein a level and a reflecting means for causing an image of the level to be incident on an eyepiece through the pentaprism or the pentamirror are arranged in the vicinity of the pentaprism or the pentamirror of the single-lens reflex camera. A camera with a built-in spirit level that displays an image of the spirit level on the screen. 2. A spirit level is arranged in a lower front portion of a pentaprism or a pentamirror of a single-lens reflex camera, and a first reflecting mirror is provided in an upper front portion of the pentaprism or the pentamirror.
A second reflecting mirror is provided between the level and the lower part of the pentaprism or the pentamirror so that the light from the level can be first and second.
A camera with a built-in electronic level, which sequentially reflects the light from the third reflecting surface of a pentaprism or a pentamirror to display an image of the electronic level in the field of view in the viewfinder. 3. The camera with a built-in spirit level according to claim 1 or 2, wherein an illumination device for illuminating the spirit level is provided. 4. The camera with a built-in electronic level according to claim 3, wherein the electronic level is superposed on the lighting device. 5. The mounting seat is provided in the lower front part of the pentaprism or the pentamirror, and the second reflection from the pentaprism or the pentamirror side is provided on the mounting seat. A camera with a built-in level, in which a mirror and a level are provided, and a fixing member for supporting the first reflecting mirror is fixed on a connection surface connecting a roof reflection surface and a third reflection surface of a pentaprism or a pentamirror.